Paper Info
Title
Electronic Cleansing for Computed Tomography (CT) Colonography Using a Scale-Invariant Three-Material Model.
Abstract
A well-known reading pitfall in computed tomography (CT) colonography is posed by artifacts at T-junctions, i.e., locations where air-fluid levels interface with the colon wall. This paper presents a scale-invariant method to determine material fractions in voxels near such T-junctions. The proposed electronic cleansing method particularly improves the segmentation at those locations. The algorithm takes a vector of Gaussian derivatives as input features. The measured features are made invariant to the orientation-dependent apparent scale of the data and normalized in a way to obtain equal noise variance. A so-called parachute model is introduced that maps Gaussian derivatives onto material fractions near T-junctions. Projection of the noisy derivatives onto the model yields improved estimates of the true, underlying feature values. The method is shown to render an accurate representation of the object boundary without artifacts near junctions. Therefore, it enhances the reading of CT colonography in a 3-D display mode.
Year
DOI
Venue
2010
10.1109/TBME.2010.2040280
IEEE Trans. Biomed. Engineering
Keywords
Field
DocType
noise measurement,biomedical imaging,translation,algorithms,image resolution,scale invariance,computed tomography,radiology,partial volume
Voxel,Computer vision,Noise measurement,Medical imaging,Computer science,Segmentation,Image processing,Computed Tomography Colonography,Invariant (mathematics),Artificial intelligence,Virtual colonoscopy
Journal
Volume
Issue
ISSN
57
6
0018-9294
Citations 
PageRank 
References 
10
0.88
14
Authors
6
Name
Order
Citations
PageRank
Iwo Serlie11218.81
Frans M. Vos213318.49
Roel Truyen321819.37
Frits H. Post41389111.99
Jaap Stoker510211.12
Lucas J. van Vliet6842113.16